Method for purifying industrial wastewater by taking manganese-zinc-iron-spinel-loaded silicon dioxide fiber membrane as ozone oxidation catalyst
A silicon dioxide and ozone oxidation technology, applied in the field of environmental engineering, can solve problems such as secondary pollution and difficult recycling, and achieve the effects of low toxicity, wide source of raw materials, and low price
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Embodiment 1
[0018] Prepare a mixed solution of ethyl orthosilicate, ultrapure water and oxalic acid, and stir it magnetically for 10 hours at room temperature, wherein the molar ratio of ethyl orthosilicate to ultrapure water is 1:8.1, and the molar ratio of ultrapure water to oxalic acid is 1;0.0025. A 6wt% PVA solution of equal mass was prepared, slowly added dropwise to the above solution, 1wt% NaCl was added, and then magnetically stirred at room temperature for 2 hours to obtain a uniform precursor solution.
[0019] The obtained precursor solution was injected into the syringe, and the ET-1334 electrospinning equipment of Beijing Yongkang Leye was used for spinning. The relevant parameters were as follows: positive voltage: 15KV, negative voltage 1.5KV, advancing speed 0.08mm / min, The distance to the receiving device is 25cm, and the receiving device is 50r / min. Put the obtained fiber into a muffle furnace, raise the temperature to 800°C in an air atmosphere at a heating rate of 5°...
Embodiment 2
[0023] Prepare a mixed solution of ethyl orthosilicate, ultrapure water and oxalic acid, and stir it magnetically for 10 hours at room temperature, wherein the molar ratio of ethyl orthosilicate to ultrapure water is 1:8.1, and the molar ratio of ultrapure water to oxalic acid is 1;0.0025. A 6wt% PVA solution of equal mass was prepared, slowly added dropwise to the above solution, 1wt% NaCl was added, and then magnetically stirred at room temperature for 2 hours to obtain a uniform precursor solution.
[0024] The obtained precursor solution was injected into the syringe, and the ET-1334 electrospinning equipment of Beijing Yongkang Leye was used for spinning. The relevant parameters were as follows: positive voltage: 15KV, negative voltage 1.5KV, advancing speed 0.08mm / min, The distance to the receiving device is 25cm, and the receiving device is 50r / min. Put the obtained fiber into a muffle furnace, raise the temperature to 800°C in an air atmosphere at a heating rate of 5°...
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